掌握JXLS:高效Java Excel处理库的终极指南
JXLS是一个用于处理Excel文件的开源Java库,它允许你读取、写入和修改Excel文件而无需依赖Microsoft Office。以下是使用JXLS进行基本操作的示例代码:
1. 读取Excel文件:
import org.jxls.util.JxlsHelper;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
public class JXLSReadExample {
public static void main(String[] args) throws IOException {
InputStream xlsInputStream = new FileInputStream("example.xls");
InputStream xmlInputStream = new FileInputStream("template.xml");
Map<String, Object> beans = new HashMap<>();
// 填充beans Map
// ...
XLSTransformer transformer = new XLSTransformer();
transformer.transformXLS(xmlInputStream, beans, xlsInputStream);
}
}
2. 写入Excel文件:
import org.jxls.common.Context;
import org.jxls.util.JxlsHelper;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
public class JXLSWriteExample {
public static void main(String[] args) throws IOException {
OutputStream outputStream = new FileOutputStream("output.xls");
Map<String, Object> beans = new HashMap<>();
// 填充beans Map
// ...
Context context = new Context();
context.putVar("beans", beans);
JxlsHelper.getInstance().processTemplate(new FileInputStream("template.xls"), outputStream, context);
}
}
3. 使用JXLS进行复杂转换:
import org.jxls.common.Context;
import org.jxls.util.JxlsHelper;
import java.io.*;
import java.util.List;
import java.util.Map;
public class JXLSComplexTransformExample {
public static void main(String[] args) throws IOException {
OutputStream outputStream = new FileOutputStream("complex_output.xls");
List<Person> people = // 获取人员列表
// ...
Context context = new Context();
context.putVar("people", people);
JxlsHelper.getInstance().processTemplate(new FileInputStream("complex_template.xls"), outputStream, context);
}
}
class Person {
String name;
int age;
// getters and setters
}
这些示例展示了如何使用JXLS库读取、写入和转换Excel文件。在实际应用中,你需要根据模板文件和数据结构定制代码。
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